In search of improved approaches to antibiotic stewardship : can we explain variations in physician practice patterns related to outpatient infection management?
Abstract
The discovery of antibiotics was one of the most significant advances in modern medicine; however, our reliance on antibiotics is threatened by the spread of resistance. Antibiotic resistance is a natural phenomenon that is exacerbated by selection pressure from antibiotic use. Where prescriptions are required for antibiotics, understanding prescribing behaviour is paramount. Guidelines recommend antibiotics for respiratory tract infections (RTIs) only when pneumonia or other serious complications are suspected. Urine cultures are recommended for complicated, but not uncomplicated, urinary tract infections (UTIs). The objectives of this thesis were to identify factors related to patients, physicians, and geographic regions associated with antibiotic use for RTIs, and urine culturing for UTI; and to explore the extent of variations in these practices across physicians. A systematic review of the literature was conducted to assess factors that have previously been empirically associated with antibiotic prescribing. Then, using linked administrative datasets, factors associated with antibiotic prescriptions for paediatric respiratory tract infection were analyzed. Urine culture data was subsequently linked in, to explore urine culturing practices. These analyses demonstrated that observed physician characteristics had a stronger influence on practice patterns that did differences in patient characteristics. In particular, physicians who had been in practice for longer tended to…
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